a)Write 3 major changes occur in girls and boys in the age group of 10-14 years? b) What happens if the mature ovum is not fertilized in a female body of human? What we call that process?
Answers
1 major change that occur in girls and boys in the age group of 10-14 are:
The teenage years are also called adolescence. This is a time for growth spurts and puberty changes (sexual maturation). A teen may grow several inches in several months, followed by a time of very slow growth. Then they may have another growth spurt. Puberty changes may happen slowly.
Answer:
a) Ans. Changes in males (boys)
1) Widening of shoulder.
2) Deepening of voice
3) Appearance of beard and moustaches
4) Growth of sex organs
Changes in females (girls)
1) Widening of pelvis and hips.
2) High pitch voice.
3) Growth of auxiliary and pubic hair
4) Initiation of menstrual cycle.
5) Growth of mammary glands.
b) If the egg does not become fertilized, the lining of the uterus (endometrium) is shed during menstruation. The average menstrual cycle lasts 28 days. The cycle starts with the first day of one period and ends with the first day of the next period. The average woman ovulates on day 14.